Reduce an image and inspect the result
Compress Image reduces a JPEG, PNG, or WebP file with your chosen output format. For PNG, Automatic reduces colors for a smaller file; Lossless preserves the original image detail. JPEG and WebP have an adjustable quality setting. The comparison view shows the actual output size and appearance before you download anything.
Choose quality and format
Lower quality can produce a smaller file, especially for photographs, but it can also soften detail or introduce visible artifacts. Start near the default, inspect text and edges at full size, then lower the setting only as far as the image allows.
The quality value is an encoding setting out of 100, not the percentage of original detail kept. An already compressed JPEG or WebP may need a low setting before it becomes smaller. A higher setting cannot restore detail lost in earlier compression and may increase the file size.
JPEG is often effective for photographs and does not preserve transparency. JPG and JPEG are two extensions for the same format.
WebP often balances photo quality and file size and can preserve transparency.
PNG offers Automatic and Lossless for an existing PNG. Automatic keeps dimensions and transparent backgrounds but may change fine colors and semi-transparent edges. Lossless keeps the original detail, colors and transparency, but may save very little on an already optimized file.
Changing format is a conversion, not just compression. A converted result can be larger than the source and is still made available because you explicitly chose another format. For the same format, the tool does not create a duplicate download when the valid result is not smaller.
How to compress an image
Choose an image
Add a static JPEG, PNG, or WebP file. The tool verifies the image before showing the controls.
Adjust the result
Choose an output format and quality, or Automatic/Lossless for PNG. Compress the image, then drag the comparison slider to inspect both versions.
Download the file
Check the dimensions, file size, and visible quality before downloading the new image.
If you need to change width or height as well, use the Resize Image.
Compatibility for very large images
Large images can require substantial browser memory, especially on phones. Follow the size and dimension guidance shown by the tool. If processing fails, try a smaller image or a computer.
For Lossless PNG-to-PNG compression, the original color detail, transparency and orientation are preserved, including 16-bit samples. The internal storage can change without changing the decoded image. Embedded metadata may remain: this mode is not a metadata-removal tool. If optimization or verification fails, no replacement file is offered.
Automatic PNG compression, JPEG/WebP output and conversion from another format to PNG use standard sRGB color and 8 bits per channel. Embedded color profiles are interpreted before conversion, but the original profile and other metadata are not copied. Wide-gamut colors or higher-bit-depth gradients may change; the tool shows relevant notices before processing. Available formats depend on browser support, image dimensions and available processing resources.
What quality setting should I use for image compression?
Start with the default and inspect detailed areas in the comparison. Lower quality gradually until the file size is useful without visible damage.
Which is smaller: JPEG, PNG, or WebP?
It depends on the image. JPEG and WebP are usually better for photographs, while PNG is often better for flat graphics, sharp text, and transparency.
Why did my image not become smaller?
The source may already be efficiently encoded. Lossless PNG optimization preserves detail and cannot always make a file smaller. Try Automatic if some color changes are acceptable. For JPEG or WebP, a lower quality setting may reduce the size further. Same-format results that are not smaller are not offered as duplicate downloads.
Will image compression remove transparency?
PNG and WebP can preserve transparency. JPEG turns transparent areas white, so check the preview before downloading in that format.
Are my images uploaded?
No. Inspection and compression run in your browser after the page loads. The selected image is not sent to Utilaxy for processing.